Each of the first 4 pit stops a race car driver makes loses ten seconds off the leader. the pit crew makes adjustments, and at each of the next two pit stops he gains 7 seconds on the leader. how much time is the driver off the leader? show work
a. -40 seconds
b. 14 seconds
c.-26 seconds
d. -54 seconds

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

How to do this , and can some one explain